Improvement bn locomotive-boilers



UNITED STATES PATENT OFFICE.

BENJAMIN L. GRIFFITH, OF I-IAZLETGN, PENNSYLVANIA.

EMPROVEMENT EN LOCOMOTIVE-BOILERS.

Specification forming part of Letters Patent No. 24,862, dated July 26,1859.

To @ZZ whom, t may concern:

Be it known that 1,1-3ENJAMIN L. GRIFFITH, of llazleton, in the countyof Luzerne and State of Pennsylvania, have invented a new and usefulImprovement in Steam-Boilers; and I do hereby declare the following tobe a full, clear, and exact description of the same, reference being hadto the accompanying drawings, and to the letters of reference markedthereon.

My vinvention consists in certain deiiectors arranged within aspacebetween the fire-box and tubesplate of a locomotiveboiler, substantiallyas described hereinafter, in combination with openings in the side ofthe [ire-box for the admission of jets of atmospheric air', so that thelatter maybe thoroughly mixed with the gaseous products of combustion asthey pass from the fire-box and impinge against the deflectors, therebyigniting the gases, which would otherwise pass off unconsumed to thechimney.

In order to enable others to make and use my invention, I will nowproceed to describe its construction and the effect produced.

On reference to the accompanying drawings, which form a part of thisspecification, Figure l lis a sectional plan of my improvedsteam-boilers; Fig. 2, a longitudinal sectional elevation; Fig. 3, atransverse sectional elevation through the 'firelbox Similar lettersrefer to simi lar parts through out the several views.

As regards exterior form, my improved boiler is similar to those used inconnection with locomotive steam-engines.

A is the outer shell of the boiler; I3, the lirebox; C, a chamberbetween the tube-sheet d and the fire-box; D, the tubes, and E thesmoke-chamber.

The sides of the fire-box B are stayed to the shell of the boiler bybolts, which are of the usual construction, except such as are situatedat or near the top of the fuel, the row of stay-bolts at this point, andrepresented at a a, being tubular, so that the external air may passthrough them into the lire-box.

Within the chamber C are three waterspaces, G, G', and H, which I termthe deflectors, the deiector II being at the far end of the lire-box,situated midway between the sides of the same, and of such a width as toallow suiiicient opening on each side for the passage of the products ofcombustion. The deflectors G and G are situate( --one on each side ofthe space c opposite to each other and y from thence to the chimney.

about midway between the defiector H and the tube-sheet d, the spacebetween the ends of the two deiectors being suiticient to allow for afree passage of the products of combustion. The deiieetor II is convexon the side nearest the fire-place and concave on the opposite side, andthe deflectors G and G may project at right angles from the sides of theboiler into the space c, although I prefer making them of the curvedform represented in drawings, Fig, l.

The products of combustion passing from the furnace strike the deilectorII and are directed by the curved form of the latter to the openings oneach side, through which they pass, and, striking the delectors G andG', recoil from the latter, strike against the concave side of thedeiiector II, recoil from thence` and pass through the space between thedefiectors G and G toward the tubes D,throu gh which they pass into thesmoke-box E, and

The cold air entering through the hollow stay-bolts a ct takes the samecourse as the products of combustion,`and becomes thoroughly mixed withthe latter by coming in contact with and being agitated by thedeflectors, so that on reaching the rear of the chamber C the gaseousproducts of combustion become thoroughly ignited by being mixed with theair, and pass in the form of a Iiame through the tubes D.

Although I have illustrated and described the defiectors G, G, and II asforming waterspaces, they will serve precisely the same purpose if madeof iire-brick or other suitable material.

I do not claim, broadly, detlectors situated in the interior ofsteam-boilers for the purpose of mixing the gaseous products of eombustion with atmospheric air; but

I claim as my invention and desire to secure by Letters Patent- The defiectors G, l', and H, arranged within the space c, between the tire-placeand the tube-sheet of a locomotive-boiler, substantially as described,in combination with openings in the fire-box for the admission ofatmospheric air, for the purpose specified.

In testimony whereof I have signed my name to this specification in thepresence of two subscribin g witnesses.

B. L. GRIFFITH.

Witnesses:

GEORGE SEIPF, GEORGE A. BIERAU.

